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MathGroup Archive 1991

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Simplify[] problem

  • To: mathgroup at yoda.ncsa.uiuc.edu
  • Subject: Simplify[] problem
  • From: "Keith R. Slavin" <keith at videovax.tv.tek.com>
  • Date: Tue, 12 Feb 91 10:18:42 PST

When asked to Simplify[] this expression:

(E^((k + -I*w)*x)*(k + m + -I*w))/
  (2*(-E^((k + -I*w)*(-1/2 + x))/2 + E^((k + -I*w)*(1/2 + x))/2))

Mathematica does NOTHING with it (not even cancelling out the 2's in the
denominator)! The terms with x should cancel altogether, and indeed they do
if I replace (k - I w)  with  a single variable, or remove the 'm' from the
expression, or several other minor changes...

This is causing me real problems in a situation where I cannot 'special case'
for a general-purpose algorithm. Is there some sort of expression conditioning
I can do before calling simplify, or do I have to wait for 'fixed in version
2.0'?

Regards,
Keith Slavin,
Tektronix Inc,
Beaverton, OR
(503) 627 4907





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